Well, no offense but you seems to be missinformated.
The research about what happend shows that they killed and kidnapped many busisness men just to robb their assets.
They did the same with many people, Estela de Carloto included. They were criminals and they behave like criminals.
What about the kidnapped babies? They sold them.
They also raped female and pregnant prisioners and cut their genitals (Masacre de Margarita Belen).
Don t forget the torture to men and pregnant women.
And, of course, the hidden assesination with Videla saying on national TV that there weren t desaparecidos, thet they are in Cuba or Paris.
So, yes, they are criminal and they deserve to be in Jail.
I guess that people didn t take justice by their own hands because this is precisely what happend during the 70 s and everybody was tired about political violence. And everybody wanted justice, and they finally found it.
Regards